<template>

  <div class="app-container">

    <h2 style="text-align: center;">发布新课程</h2>

    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <el-button type="text" @click="openChapterDialog()">添加章节</el-button>

    <!-- 章节 -->
    <ul class="chanpterList">
      <li
        v-for="chapter in chapterVideoList"
        :key="chapter.id">
        <p>
          {{ chapter.title }}

          <span class="acts">
                    <el-button style="" type="text" @click="openEditDialog(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
        </p>

        <!-- 视频 -->
        <ul class="chanpterList videoList">
          <li
            v-for="video in chapter.children"
            :key="video.id">
            <p>{{ video.title }}

              <span class="acts">

                    <el-button style="" type="text" @click="openEditVideo(video.id)">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)" >删除</el-button>
                </span>
            </p>
          </li>
        </ul>
      </li>
    </ul>
    <div>
      <el-button @click="previous">上一步</el-button>
      <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>
    </div>

    <!-- 添加和修改章节表单 -->
    <el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
      <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
          <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
          <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 添加和修改课时表单 -->
    <el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
      <el-form :model="video" label-width="120px">
        <el-form-item label="课时标题">
          <el-input v-model="video.title"/>
        </el-form-item>
        <el-form-item label="课时排序">
          <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
        </el-form-item>
        <el-form-item label="是否免费">
          <el-radio-group v-model="video.free">
            <el-radio :label="true">免费</el-radio>
            <el-radio :label="false">默认</el-radio>
          </el-radio-group>
        </el-form-item>

        <el-form-item label="上传视频">
          <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo">
            <el-button size="small" type="primary">上传视频</el-button>
            <el-tooltip placement="right-end">
              <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
              <i class="el-icon-question"/>
            </el-tooltip>
          </el-upload>
        </el-form-item>

      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
        <el-button :disabled="saveVideoBtnDisabled=false" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
      </div>
    </el-dialog>

  </div>
</template>
<script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'

export default {
  data() {
    return {
      saveBtnDisabled:false,
      courseId:'',//课程id
      chapterVideoList:[],
      chapter:{ //封装章节数据
        title: '',
        sort: 0
      },
      video: {
        title: '',
        sort: 0,
        free: 0,
        videoSourceId: '',
        videoOriginalName:''//视频名称
      },
      dialogChapterFormVisible:false,//章节弹框
      dialogVideoFormVisible:false, //小节弹框


      fileList: [],//上传文件列表
      BASE_API: process.env.BASE_API // 接口API地址
    }
  },
  created() {
    //获取路由的id值
    if(this.$route.params && this.$route.params.id) {
      this.courseId = this.$route.params.id
      //根据课程id查询章节和小节
      this.getChapterVideo()
    }
  },
  methods:{
    //点击确定调用的方法
    handleVodRemove() {
      //调用接口的删除视频的方法
      video.deleteAliyunVod(this.video.videoSourceId)
        .then(response => {
          //提示信息
          this.$message({
            type: 'success',
            message: '删除视频成功!'
          });
          //把文件列表清空
          this.fileList = []
          //把video视频id和视频名称值清空
          //上传视频id赋值
          this.video.videoSourceId = ''
          //上传视频名称赋值
          this.video.videoOriginalName = ''
        })
    },
    //点击×调用这个方法
    beforeVodRemove(file,fileList) {
        return this.$confirm(`确定移除 ${ file.name }？`);
    },

    //上传视频成功调用的方法
    handleVodUploadSuccess(response, file, fileList) {
      //上传视频id赋值
      this.video.videoSourceId = response.data.videoId
      //上传视频名称赋值
      this.video.videoOriginalName = file.name
    },
    handleUploadExceed() {
      this.$message.warning('想要重新上传视频，请先删除已上传的视频')
    },
//==============================小节操作====================================
    //回显
    openEditVideo(videoId){
      this.dialogVideoFormVisible=true
      video.getVideo(videoId)
        .then(response=>{
          this.video=response.data.video
          this.fileList=[this.video.videoOriginalName]
          console.log(this.fileList)
        })
    },
    //修改
    updateVideo(){
      video.updateVideo(this.video)
        .then(response=>{
          //关闭弹框
          this.dialogVideoFormVisible=false
          //提示信息
          this.$message({
            type: 'success',
            message: "修改小节成功"
          })
          //刷新页面
          this.getChapterVideo()
        })
    },
    //删除小节
    removeVideo(id) {
      this.$confirm('此操作将删除小节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {  //点击确定，执行then方法
        //调用删除的方法
        video.deleteVideo(id)
          .then(response =>{//删除成功
            //提示信息
            this.$message({
              type: 'success',
              message: '删除小节成功!'
            });
            //刷新页面
            this.getChapterVideo()
          })
      }) //点击取消，执行catch方法
    },
    //添加小节弹框的方法
    openEditDialog(chapterId) {
      //弹框
      this.dialogVideoFormVisible = true
      //清空
      this.video = {}
      this.fileList = []
      //设置章节id
      this.video.chapterId = chapterId

    },
    //添加小节
    addVideo() {
      //设置课程id
      this.video.courseId = this.courseId
      video.addVideo(this.video)
        .then(response => {
          //关闭弹框
          this.dialogVideoFormVisible = false
          //提示
          this.$message({
            type: 'success',
            message: '添加小节成功!'
          });
          //刷新页面
          this.getChapterVideo()
        })
    },
    //添加或保存小节
    saveOrUpdateVideo(){
      if(!this.video.courseId){
        this.addVideo()
      }else{
        this.updateVideo()
      }
    },
//==============================章节操作====================================
    //删除章节
    removeChapter(chapterId) {
      this.$confirm('此操作将删除章节, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).then(() => {  //点击确定，执行then方法
        //调用删除的方法
        chapter.deleteChapter(chapterId)
          .then(response =>{//删除成功
            //提示信息
            this.$message({
              type: 'success',
              message: '删除成功!'
            });
            //刷新页面
            this.getChapterVideo()
          })
      }) //点击取消，执行catch方法
    },
    //修改章节弹框数据回显
    openEditChatper(chapterId) {
      //弹框
      this.dialogChapterFormVisible = true
      //调用接口
      chapter.getChapter(chapterId)
        .then(response => {
          this.chapter = response.data.chapter
        })
    },
    //弹出添加章节页面
    openChapterDialog() {
      //弹框
      this.dialogChapterFormVisible = true
      //表单数据清空
      this.chapter.title = ''
      this.chapter.sort = 0
    },
    //添加章节
    addChapter() {
      //设置课程id到chapter对象里面
      this.chapter.courseId = this.courseId
      chapter.addChapter(this.chapter)
        .then(response => {
          //关闭弹框
          this.dialogChapterFormVisible = false
          //提示
          this.$message({
            type: 'success',
            message: '添加章节成功!'
          });
          //刷新页面
          this.getChapterVideo()
        })
    },
    //修改章节的方法
    updateChapter() {
      chapter.updateChapter(this.chapter)
        .then(response =>  {
          //关闭弹框
          this.dialogChapterFormVisible = false
          //提示
          this.$message({
            type: 'success',
            message: '修改章节成功!'
          });
          //刷新页面
          this.getChapterVideo()
        })
    },
    saveOrUpdate() {
      if(!this.chapter.id) {
        this.addChapter()
      } else {
        this.updateChapter()
      }
    },
    //根据课程id查询章节和小节
    getChapterVideo() {
      chapter.getAllChapterVideo(this.courseId)
        .then(response => {
          this.chapterVideoList = response.data.allChapterVideo
        })
    },
    previous() {
      this.$router.push({path:'/course/info/'+this.courseId})
    },
    next() {
      //跳转到第二步
      this.$router.push({path:'/course/publish/'+this.courseId})
    }
  }
}
</script>
<style scoped>
.chanpterList{
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
  float: right;
  font-size: 14px;
}

.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}

</style>
